GCVT(3)



GCVT(3)                    Linux Programmer's Manual                   GCVT(3)

NAME
       gcvt - convert a floating-point number to a string

SYNOPSIS
       #include <stdlib.h>

       char *gcvt(double number, int ndigit, char *buf);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       gcvt():
           Since glibc 2.12:
               (_XOPEN_SOURCE >= 500) ! (_POSIX_C_SOURCE >= 200112L)
                   || /* Glibc since 2.19: */ _DEFAULT_SOURCE
                   || /* Glibc versions <= 2.19: */ _SVID_SOURCE
           Before glibc 2.12:
               _SVID_SOURCE || _XOPEN_SOURCE >= 500

DESCRIPTION
       The gcvt() function converts number to a minimal length null-terminated
       ASCII string and stores the result in buf.  It produces ndigit signifi-
       cant digits in either printf(3) F format or E format.

RETURN VALUE
       The gcvt() function returns buf.

ATTRIBUTES
       For  an  explanation  of  the  terms  used  in  this  section,  see at-
       tributes(7).

       +----------+---------------+---------+
       |Interface | Attribute     | Value   |
       +----------+---------------+---------+
       |gcvt()    | Thread safety | MT-Safe |
       +----------+---------------+---------+

CONFORMING TO
       Marked as LEGACY in POSIX.1-2001.  POSIX.1-2008 removes the  specifica-
       tion  of  gcvt(),  recommending  the  use of sprintf(3) instead (though
       snprintf(3) may be preferable).

SEE ALSO
       ecvt(3), fcvt(3), sprintf(3)

COLOPHON
       This page is part of release 5.07 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.

                                  2017-09-15                           GCVT(3)

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